Street/strip 400/430/455

Building your GS motor? Ask all questions relating to the late big block here.

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  1. 436'd Skylark

    B4B vs. SP-1 and a quest for mileage..

    436'd Skylark, Aug 3, 2020 ... 2
    Replies:
    36
    Views:
    3,223
    Quick Buick
    Oct 20, 2023
  2. rus

    400/455 auto flywheel same?

    rus, Nov 30, 2021
    Replies:
    19
    Views:
    1,221
    LARRY70GS
    Oct 19, 2023
  3. Stevem

    Seal warning

    Stevem, Oct 18, 2023
    Replies:
    3
    Views:
    253
    Schurkey
    Oct 18, 2023
  4. Al T

    455 to 350 in a '67 Skylark

    Al T, Oct 17, 2023
    Replies:
    7
    Views:
    190
    nekkidhillbilly
    Oct 18, 2023
  5. Weekender

    Serpine belt systems for 455

    Weekender, Sep 23, 2004 ... 6 7 8
    Replies:
    145
    Views:
    23,576
    Hotrodgss1
    Oct 14, 2023
  6. WQ59B

    Header heat vs. PS

    WQ59B, Sep 15, 2023
    Replies:
    6
    Views:
    378
    NZ GS 400
    Oct 12, 2023
  7. VET

    Who has heard the thin-walled cylinder 455 engine is prone to overheating.

    VET, Jul 26, 2023 ... 3 4 5
    Replies:
    81
    Views:
    2,389
    VET
    Oct 11, 2023
  8. Al T

    400 Crank and Rod Question. Interchangeability

    Al T, Oct 6, 2023
    Replies:
    4
    Views:
    275
    Al T
    Oct 10, 2023
  9. Canadian GS 350

    Dyno results with the 290-94 H cam

    Canadian GS 350, Oct 8, 2023
    Replies:
    3
    Views:
    476
    Mark Demko
    Oct 10, 2023
  10. rdirks

    Exhaust Advice

    rdirks, Apr 25, 2023 ... 2
    Replies:
    29
    Views:
    1,198
    VET
    Oct 10, 2023
  11. VET

    Does PCV pull oil and carbon deposits into the intake manifold?

    VET, Sep 25, 2023
    Replies:
    19
    Views:
    867
    VET
    Oct 9, 2023
  12. Canadian GS 350

    Break in oil viscosity

    Canadian GS 350, Sep 26, 2023 ... 2
    Replies:
    22
    Views:
    744
    Fox's Den
    Oct 6, 2023
  13. eagleguy

    455 cu 1970 vs 1972

    eagleguy, Oct 2, 2023 ... 2
    Replies:
    26
    Views:
    1,092
    rjay
    Oct 6, 2023
  14. stall1970

    Jahns piston

    stall1970, Sep 27, 2023
    Replies:
    2
    Views:
    242
    VET
    Sep 27, 2023
  15. VET

    How important is it to have a good .040 squish/quench?

    VET, Sep 11, 2023 ... 2 3 4
    Replies:
    73
    Views:
    2,209
    Mark Demko
    Sep 26, 2023
  16. Frankie70GS

    Header gasket port matching

    Frankie70GS, Sep 20, 2023 ... 2
    Replies:
    21
    Views:
    776
    hugger
    Sep 26, 2023
  17. 12lives

    AC Bracket Trivia

    12lives, Sep 24, 2023
    Replies:
    6
    Views:
    223
    Nearing
    Sep 25, 2023
  18. VET

    What is normal water temperature for a 455 engine with A/C engaged?

    VET, Aug 29, 2023 ... 2 3
    Replies:
    53
    Views:
    1,325
    VET
    Sep 23, 2023
  19. Canadian GS 350

    SPX intake - port to match gasket or as cast……hp difference ?

    Canadian GS 350, Sep 20, 2023
    Replies:
    10
    Views:
    560
    Bens99gtp
    Sep 21, 2023
  20. robert v

    Cast iron cylinder head question (is damage repairable?)

    robert v, Sep 18, 2023
    Replies:
    7
    Views:
    446
    Stevem
    Sep 20, 2023
  21. mkingan1212

    need help on Edelbrock intake mounts/ports

    mkingan1212, Mar 19, 2017 ... 2
    Replies:
    23
    Views:
    2,330
    Fred vandenHeuvel
    Sep 19, 2023
  22. 1969briviera

    Buick's head design

    1969briviera, Sep 13, 2023 ... 2 3 4
    Replies:
    67
    Views:
    2,034
    PGSS
    Sep 18, 2023
  23. Jeremy Zepnick

    Lost dang it!

    Jeremy Zepnick, Sep 16, 2023
    Replies:
    5
    Views:
    309
    2manybuicks
    Sep 17, 2023
  24. knucklebusted

    Magnets on Oil Filters Anyone?

    knucklebusted, May 7, 2023 ... 2
    Replies:
    24
    Views:
    948
    Guy Parquette
    Sep 13, 2023
  25. APVGS

    430 Head Porting

    APVGS, Aug 10, 2023
    Replies:
    14
    Views:
    548
    Stevem
    Sep 12, 2023
  26. Jerrit72Riv

    Hydraulic flat tappet lifters

    Jerrit72Riv, Oct 12, 2021 ... 2
    Replies:
    25
    Views:
    2,026
    mikegs400
    Sep 11, 2023
  27. Big Twist

    455 overheated 1975 Lesabre

    Big Twist, Aug 18, 2023 ... 2
    Replies:
    27
    Views:
    867
    CanadaCat
    Sep 8, 2023
  28. Houndogforever

    Starter issues on 455.

    Houndogforever, Sep 6, 2023
    Replies:
    9
    Views:
    264
    BUICKRAT
    Sep 7, 2023
  29. knucklebusted

    Left Me on the Side of the Road! Now What?

    knucklebusted, Aug 1, 2023 ... 2 3 4
    Replies:
    61
    Views:
    2,527
    knucklebusted
    Sep 3, 2023
  30. srb

    Lifter tick 430?

    srb, Jan 9, 2023 ... 2
    Replies:
    29
    Views:
    1,295
    srb
    Aug 29, 2023
  31. got_tork

    430 Rocker Arms

    got_tork, Aug 28, 2023
    Replies:
    2
    Views:
    235
    DaWildcat
    Aug 28, 2023
  32. 69_GS_400

    400 cooling and oil pressure issue

    69_GS_400, Aug 10, 2017 ... 8 9 10
    Replies:
    180
    Views:
    6,693
    69_GS_400
    Aug 27, 2023
  33. Atbb

    Exhaust question - offset or central position?

    Atbb, May 24, 2023 ... 2
    Replies:
    25
    Views:
    1,047
    BillA
    Aug 27, 2023
  34. George D.

    Head bolt suggestions? Shanked? Call ARP?

    George D., Aug 22, 2023
    Replies:
    15
    Views:
    362
    Schurkey
    Aug 23, 2023
  35. 68Buick-Jim

    Main bearing cap bolt torque spec.

    68Buick-Jim, Aug 18, 2023
    Replies:
    11
    Views:
    473
    rjay
    Aug 22, 2023
  36. RellyRell3605

    Won't stay running

    RellyRell3605, Aug 20, 2023
    Replies:
    16
    Views:
    527
    LARRY70GS
    Aug 22, 2023
  37. 1969briviera

    Oil consumption 430ci

    1969briviera, Aug 10, 2023 ... 2 3 4
    Replies:
    72
    Views:
    2,111
    1969briviera
    Aug 18, 2023
  38. Canadian GS 350

    Piston brand ?

    Canadian GS 350, Aug 15, 2023
    Replies:
    9
    Views:
    451
    Canadian GS 350
    Aug 16, 2023
  39. Canadian GS 350

    Cam id?

    Canadian GS 350, Aug 15, 2023
    Replies:
    2
    Views:
    221
    DaWildcat
    Aug 15, 2023
  40. hvramesq

    Please help Identify

    hvramesq, Aug 14, 2023
    Replies:
    3
    Views:
    200
    Matt Knutson
    Aug 14, 2023
  41. ArcticRyan

    430 rebuild

    ArcticRyan, Mar 14, 2023 ... 4 5 6
    Replies:
    106
    Views:
    4,299
    alaskagn
    Aug 14, 2023
  42. hvramesq

    1971 stage 1 head ID

    hvramesq, Aug 11, 2023
    Replies:
    2
    Views:
    251
    thepartsman
    Aug 12, 2023
  43. mattd3933

    Building a project 71 GS. looking for Distributor advice

    mattd3933, Aug 7, 2023
    Replies:
    12
    Views:
    460
    Canadian GS 350
    Aug 9, 2023
  44. rkammer

    Pertronix interface with tachometers

    rkammer, Jul 29, 2023
    Replies:
    4
    Views:
    358
    Bigpig455
    Aug 7, 2023
  45. VET

    Upgrade a Base 455 to a Stage 1 Engine

    VET, Aug 1, 2023 ... 2 3 4
    Replies:
    68
    Views:
    1,881
    TrunkMonkey
    Aug 7, 2023
  46. Edward Crosson

    Starter nose cone breaking

    Edward Crosson, Jul 10, 2023 ... 2
    Replies:
    32
    Views:
    950
    BUICKRAT
    Aug 5, 2023
  47. George D.

    Intake manifold gasket/ valley pan- which one?

    George D., Aug 4, 2023
    Replies:
    2
    Views:
    280
    hugger
    Aug 4, 2023
  48. TommyV

    With TA performance heads probably not available for a long time..

    TommyV, May 11, 2023 ... 2
    Replies:
    20
    Views:
    1,811
    Freakazoid
    Aug 4, 2023
  49. 70staged

    3" exhaust

    70staged, Aug 2, 2023
    Replies:
    10
    Views:
    542
    BrianTrick
    Aug 4, 2023
  50. Bluzilla

    New " MUST HAVE" Lifter Valley Baffle Tray from T/A Performance

    Bluzilla, Oct 12, 2016 ... 2
    Replies:
    32
    Views:
    3,380
    mbryson
    Jul 30, 2023
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